Valve for internal-combustion engines.



\ o. E. sWENsoN. VALVE FOR INTERNAL GOMBUSTION ENGINES.

APPLIOATION FILED JULY 8, 1912.

Patented Nov. 4, 1913.

WFM

Fil/2511251".-

CarZ EwelzSo/a 7% MMV CARL E.

sWENsoN, oF ROCKFORD,

ILLINOIS.

VALVE FOR INTERNAL-COMBUSTION ENGINES.

To ZZ 107mm it may Concern Be it known that I, CARL E. SwENsoN, acitizen of the United States, residing at Rockford, in the county oflVinnebago and State of Illinois, have invented certain new and usefulImprovements in Valves for Internal-Combustion Engines, of which thefollowing is a specification.

This invention relates to valves of the rotary or oscillatory type.

'Ihe objects of the invention are to provide effectively for theexpansion due to heat and to prevent loss of compression.

In the accompanying` drawings, Figure 1 is a sectional view illustratingan internalcombustion engine provided with valves embodying the featuresof my invention. Fig. 2 is a sectional view taken in the plane of dottedline 2 2 of Fig. 1. Fig. 3 is a section on line 3 3 of Fig. 2. Fig. 4 isa section through the valve member, taken in the plane of dotted line 44 of Fig. 1, but on a reduced scale.

My invention may be applied to engines of any suitable cylinderconstruction, a common form being shown in the drawings. For the purposeof illustrating the invention, I have shown it as applied to an enginehaving separate intake and exhaust valves, but certain features of theinvention are equally applicable to a valve serving for both inlet andexhaust.

In the construction herein shown a valveA shown, or in any preferredmanner. Vith-- in the valve casing 1 is mounted a cylindrical valvemember 5, a sleeve 6 being interposed between the valve member and theinterior walls of the valve casing. The sleeve 6 may be held againstrotation in any suitable manner, as by means of lugs 7 on the plates 2,said lugs lying within notches 8 in said sleeve. The sleeve has anelongated opening 9 therein communicating with the passage 4; and atanother point (as, for example, diametrically opposite the opening 9 asherein shown) the sleeve is provided with an elongated opening 10communicating with the mixture supply or ex- Speciication of LettersPatent.

Application filed July 8, 1912.

Patented Nov. 4, 1913.

Serial No. 708,154.

haust passage a, as the case may be. The sleeve 6 is completely severedor split along a line extending longitudinally of the sleeve at asuitable point;` herein said sleeve is shown as severed along the lineof the opening 10 by means of the slot- 1l. The sleeve is thus renderedyielding, or expansible and contractible, so as to conform to changes inthe diameter of the valve member 5. To permit of such expansion of thesleeve, the latter has a free or easy fit within the casing 1. The valvemember 5 has a port 12 extending diametrically therethrough and adaptedto connect the openings 9 and 10. Said valve member may be turned by anysuitable means. Herein I have shown it as arranged for continuousrotation in one direction by means of a sprocket wheel 13 attached tothe spindle 14 of the valve member. The sprocket wheel 13 may be drivenfrom any suitable shaft of the engine at a speed appropriate to theengine cycle, as, for example, at one-fourth of the crank-shaft speed inthe case of a four-cycle engine.

To prevent leakage of gases along the periphery of the sleeve 6 and pastthe ends of said sleeve, I provide suitable means, as, for example,metallic split rings 15 lying within grooves formed in the periphery ofthe sleeve. As shown in Figs. 2 and 3 the ends of said grooves areclosed, that is to say, they do not extend to or communicate with theslots 1l, thereby preventing gas from leaking past the edges of therings and escaping into said slots. The valve member 5 may be lubricatedby any preferred means.

In operation, the split sleeve 6 yields or expands when the valve member5 expands by reason o-f the heat to which it is subjected, and contractsas the valve member cools, thereby maintaining at all times a gas-tightfit between the sleeve and the valve member, and at the same timepreventing' sticking or undue tightness between the valve member and thesleeve. Rotation of the valve member is not interfered with by thepressure of the gases within the cylinder, since only that portion ofthe valve member which is behind the opening 9 is exposed to said gasesduring the period of explosion and expansion. The pressure of the gaseswithin the cylinder, exerted upon that portion of the sleeve 6 which isexposed at the passage 4, tends to push the sleeve away from saidpassage and thus causes said sleeve to be pressed into gas-tight contactwith t-he part of the valve easing which surrounds the opening a,thereby preventing leakage of gas through said opening a. The splitrings 15 are of suilicient length to extend to the area o gastightContact just referred to, thus preventing leakage of gases past the endsof said rings.

I claim as my invention:

l. A valve construction for internal-combustion engines comprising avalve casing having inl-et and outlet passages, an expansible andcontractible split sleeve non-rotatably mounted Within said casing andhaving openings communicating with said passages, a cylindrical valvemember Within said sleeve and having fluid-passage means arranged tocommunicate with the openings in the sleeve, and means for operatingsaid f'alve member.

A valve construction for internal-coinbustion engines comprising a valvecasing having an inner and an outer duid-passage, an expansible andcontractible split sleeve within said casing.l the split side of thesleeve being adjacent to said outer fluid-passage, a valve member Withinsaid sleeve and having fluid-passage means arranged to communicate withthe openings in the sleeve, and means for operating said valve member.

3. An internal combustion engine comprising a combustion chamber, avalve casing having' diametrically opposite inner and outer fluid-passages, said inner passage communicating with the combustion chamber, an

eXpansible and contractible split sleeve Within said casing, adapted tobe forced by the pressure Within the combustion chamber against the Wallof the valve chamber Surrounding the outer Huid-passage, said sleevehaving diametrically opposite openings reg- 40 istering With saidpassages; packing means between the sleeve and the valve casing; acylindrical valve member within said sleeve and having fluid-passagemeans arranged to communicate With the openings in the sleeve; and meansfor turning said valve member.

4:. A valve construction for internal-combustion engines comprising avalve chamber having inner and outer fluid-passages, a sleeve Withinsaid casing, said sleeve being longitudinally severed, and havingopenings communicating with said passages, said sleeve having peripheralarcuate grooves,the ends of said grooves terminating adjacent to theline of severance, said line being adja cent to said outerfluid-passage; split packing rings within said grooves; a cylindricalvalve member Within said sleeve adapted to connect said passages; andmeans `for Oper- GO ating said valve member.

In testimony whereof I hereunto a'HiX my signature in the presence oftwo Witnesses.

CARL E. SWENSON.

Witnesses Clins. GOTTA, WILLIAM JOHN soN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, ZD. C.

